These mountain ranges would be the Sierra Madre Occidental on the west and the Sierra Madre Oriental on the SE. The Sierra Madre Occidental at least has had historically some rich silver deposits. Both mountain ranges are part of the Western Cordillera which stretches from Alaska to the southern tip of South America.
Answer:
Asteroids
Explanation:
The asteroid belt is a torus-shaped region in the Solar System,<u> </u><em><u>located roughly between the orbits of the planets Jupiter and Mars</u></em><em>,</em> that is occupied by a great many solid, irregularly shaped bodies, of many sizes but much smaller than planets, called <em><u>asteroids</u></em> or minor planets.
The physical process that is responsible of the creation of these actions is the movement of earths tectonic plates. When tectonic plates push against each other they both could go up and make a little hill with a opening in it!
Decrease pesticide use
decrease the use of chemical agents
increase organic farming
